HG professional limescale remover is a highly concentrated cleaner for the removal of limescale and calcium deposits from: taps, bathtubs, toilets and shower walls and for the descaling of blocked showerheads. HG hagesan blue also removes rust, dirt, ‘yellow' stains and verdigris. And HG hagesan blue is, of course, safe for use on virtually all surfaces in the bathroom and toilet, such as: chrome, stainless steel, ceramic, glazed and unglazed ceramic tiles, glass and plastic. Depending on the degree of staining, HG hagesan blue should be used neat or diluted in water in a solution of up to 1:10. Apply HG hagesan blue with a sponge. Allow several minutes for the product to work and then remove and rinse off with water.